Steam-boiler superheater.



PATENTED JAN. 23, 1906.

10.810,619. V P J'. COLE.

STEAM BOILER SUPERHBATER.

z SHEETS-SHEET a APPLIGATION FILED SEPT. 5, 1905.

WFTNESSES :2 5 ti on. of a locomotive-boiler, illustrating an application; of

UNITED STATES PATENT onnron.

' FRANCIS J. COLE, on NEW YORK- N: 1 ASSIGNOR To AM RICAN LOCOMOTIV'E COMPANY, on. NEW YQRK, N..Y.,VA CORPORATION j on NEW YORK.

gsTEAM-so LER ,SJUPE'RHEATER.

Specification of Letters age.

Patented. Jan. 23, 1906.

Application filedseptember 5.1905. Serial Niot276l9b5. I

To aZZ whom it may concern:

Be it known that I, Fsanors J. COLE, of the borough-of Manhattan, in the city and State of New York, have-invented a certain new and useful Improvement in Steam-Boiler Superheaters, of which improvement the following is a specification. r

My present invention relates to superheaters of the general class or type inwhich he superheater-pipes are locatedin fireetubes of a steam-boiler; and its object is to provide a superheating appliance of such type inwhich the saturated steam shall be subjectedto the I heat of'the gases passing through the super:

fully set forth. r i In the accompanying drawings, Figure 1' is pipes heating-tubes while traversing in reverse direction to said gases and after having been raised thereby to the maximum temperatureshall be protected from loss of heat by tr an's-' fer thereof to the'succeeding saturated steam during its return traverse toward the steam? delivery connectionl The improvement claimed 1s hereinafter a verticalsectio'n through the forwardporperheater-pipes loca tedin said tube; Fig. 4, a

transverse section on the lineia; aof Fig. 3; and Figs. 5 and 6 similar sections showing the application-of a larger numberof super'heaterin-each superheating-tube.

M 'invefntion is herein exemplified as applie in connection with a locomotive-boiler 4," which is of the: ordinary construction and isprovided at its forward end with a smokebox 4. .A-plurality-of fire-tubes 4, "ordinarily of comparativeiylsmall diameter, extend from the fire-box at the rear end of the boiler,

- which is not shown, tothe front flue sheet 4 i to" the cylinders throng and the manager combustionpas's-tlirough' said tubes and through other. tubes'which' will presently be described to tliie,smoke-box '4", from whlch'they;

aredischar ed into the atmosphere throng a stack in t e ordinary manner. Steam is supplied from the boiler more than. T-head with one of the headers detached and indicated in broken lines;

:or'd'ry pipe,61,passing through the front flueportion of the space within t e boiler 4 which would ordinzurilybe occupied by such number of said tubes a corresporij .ngly smallernumber of tubes 67 ofgreater diameter, which will be descriptively. termed superheatingtubes, said superheating-tubes extending between and being expanded into the front fiue-sh'eet 4 and the rearfor fire-box flue- I sheet. Within each of the superheatingheater-pipes comprising an outer super= 7. tubes there are located. a system of superheater-pipefi and an inner circulatin -pipe 3 68 01, as hereinafter specified, a plura ity ofv said'outer and inner pi 'es, said pipes'extend- 67 from avertical plane a short distance-as, say, thirty inches or thereaboutE-forward of the fire-box flue-sheet to vertical planes in the smoke-box forward of; the T-head 62.

those nearerthe fire-box, are closed, ,asb'y being welded together or plugged, and their forward ends, as well as both ends'of the circulating-pipes 68 are open. The superheating-pipes 69 are madeof'sufiicientl diameter than the superheatin -tuiies 67 to to said channel'from the main steam-pipe 61.

It will be obvious that, if desired, a plural-. ity of sets of oute'i'and'inner pi cs 69 68 may be locatedin each of the super eating-tubes 67', the latter-being in suchcase made of cbr respondingly larger diameter to accommos date them; Fig. 5 illustrates the application and Fig. 6- that of four of three sets of pipes, sets of pipes ineach superheating-tube.

a main steam-pipe 1 mg longitudinally 111 t 1e si1perheatmgtubes.

The 'rear'ends of the'suberheater-pipes 69,. or

smaller permit free passage of the pro nets of comustion around them through the tubes, and

The outer and inner'superheater and circuinner pipes thus communicating,-

hiring pipes 69 of each vertical row are connected at their forward ends to a vertical casing or header '70, which is divided by a vertical partition 70 into front and rear chain bers or compartments.

.15 able sleeves or sockets 70", screwed into the partitions 70 of the headers, the outer and respectively, with. the rear and the front chambers of the headers. "Openings which are closed by removable plugs 70 arejforrned in the front walls of the headers, these openings providing for the insertion, examination, cleaning,"and repairs of the superheater and circulating pipes. In the event of leaka e. at the 2 5 joints the plugs can be detached and the circulating-pipes expanded, or stimulatingpipe or pipes can be withdrawn and the adjacent superheater pipe or pipesbc expanded, as the case may require.

In order to prevent the loss of heat which would result from its transfer from the su erheated steam passing through the circulatin pipes 68 to the saturated steam pass ng through the annular spaces between said 3 5 pipes and the superheater-pipes 69,- the circulating-pipes are jacketed or protected by an interposed non-conducting medium from direct contact with. the steam in said annular spaces. In the instance shown such prot'ec tion is etlocted by first covering the circulating-pipes 68 with casings 68 of asbestos paper or other material oi analogous character, and thereafter inclosing them in jacket-pipes 68 of sufficiently larger diameter to interpose .5 annular dead-air spaces between them and the jacket-pipes, except at and near their ends, where the jacket-pipes fit closely around the casings 68*, so as to close said dead-air spaces. The forward ends of the jac'ket pipes pass through the sockets 7 0 of the partitions of the headers and are expanded therein with the circulating-pipes.

The 6-head 62 is divided by a horizontal partition 62" into upper and lower chambers 55 orconipartments, the lower or supply compartment, .which communicates with the main stcam-supply pipe 61, having ports 62* in its front, which register with ports at the tops of the rear chambers of the headers 70, and the upper or delivery compartment having ports 62 in its front, which register with ports in thefront chambers of the headers; The branch steam-pipes 63 are'connccted to nozzles at the ends eiths upper compart 5-5 inent oi the if-head. The front taco of the The headers are. set side by side and as closely together asstasis T-head and the iiear faces of the headers,

I combustion which pass in the. opposite direction through the ,inclosing superheatintubes 67. The saturated steam being a mitted at the smoke-box ends of the su erheater-pipes, where the temperature is lbwest, is heated to its maximum when it reaches the ends 'nearer' the firebox, where the temperature ishighest, The superheated steam then passes-forwardly throu h'the circulating-p1pes 68, being protecte in its traverse through the same from loss of heat by the 0 nonp'onducting' medium interposed. between them and the surroundin annular steamspaces, ss-before describe and enters the front chambers of the headers, from which it passes into the upper ordelivery compart- 5 ment of the T-head 62 and thence through the branch p'pes 63 to the engine-cylinders for utilization therein. 1

I claimas my invention and desire to secure. by Letters Patent a I 1. The 'combination, with a tubular steam; boiler, of superheating-tubes, outer superheater-pipes ro 'ectin'g thereinto and having their rear en 8 cl osed, inner circulating-pipes open at both-ends and located-within the outer superheatef-pipes, an insertible and removable header, partitioned vertically into two chambers, communicating, respectively, with the outer superheater-pipes and the in-l ner circulating-pipes of a vertical row, a no, steam-su ply connection opening into the header-'c amber of the outer pipes, and a steam-delivery. connection leading out of the header-chamber of the inner pipes.

2. The combination with a tubular steam- I 15 boiler, of superheating-tubes, outer superheater-pipe's rof'ecting thereinto and having their rear en s c osed, lnner circulating-pipes open at both ends and located within the out-er superl1eaterpipes, a plurality of insertible and removab e headers, each part tioned vertically into two chambers, commumcating, respectively, with the" outer superheater-pipes and the inner circulatingpipes of a vertical row, a T-head partitioned 12 5 into a supply-compartment which is 0 en to the main-supply steam-pipe and a do ivorycompartment which is open to a delivery steam-pipe, ports in the supply-compartment communicating with the bee e chambers of rooms 3 5 boiler, ofv superheating-tubes, outer super- I heater-pipes prof'ecting thereinto and. iiav'ing their rear ends 0 osed, inner circulating-pipes open at both ends and iocated within the outer superheater-pipes, an insertible andre- 1o niovableheeder, partitioned verticelly into two chambers, communicating, respectively, with the outer superheatenpipes and the in neroiroulatingipes of a vertical row, a non conducting me iurn interposed between the 15 innerend theouter pipes, a, steam-supply connection opening into the header-chember of the outer pipes, and a steam-delivery connection leading out of the header-chant ber of theinner pipes.

' so 4.- The combination, with a tubular steam boiler, o; superheating tubes, outer super heiitereplpes rejecting thereinto and having their rear en' sclosed, inner circuleting pipei g vopen at both ends and located within the g: 5 outer superheeter-pipes, an insertible End re- 1 movable-header partitioned vertically; into two chambers, communicating, respectively, with theouters enter-pipes and the in- .ner-cnculating=pipes of fiertical row, casings of non-conducting materiel, asbestos paper, surrounding the circulating-pipes, a steam-supply connection opening into the header-chamber of the outer pipes, and ii steam-delivery connection lending out of the header-chamber of the inner pipes.

5. Thecombinatiomwith a. tubular steamboiler, of'superheaiingtubes, outer superheater pipes projecting thereinto'and h ving their rear ends dosed, inner circulating-pipes open at both ends and located within the outer superheeter-pipes, an insertibie and removable header partitioned vertically into two chambers, communicating, respectively, with the outer superheater-pipes end the inner circulating-pipes of a Vertical row, casings of non-conducting material, as asbestos paper, surrounding the circulating-pipes; ecketpipesinclosing and forming de "I 8 see nrounctsaid casings, 5t steam-s 1, co tion opening into the headench inher of the outer pipes,,and a steam-deli? '3 connection leadingout of the header-chamber of the inner pipes.

FRANCIS J. COLE. 

